| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1
Department of Radiology, National Police Hospital, 58 Karakbon-dong,
Songpa-gu, Seoul, 138-169, Korea.
2
Department of Radiology, Samsung Medical Center, 50 Irwon-dong, Kangnam-gu,
Seoul, 135-710, Korea.
3
Department of Orthopedic Surgery, National Police Hospital, Songpa-gu, Seoul,
138-169, Korea.
4
Department of Radiology, University of California at San Diego Medical Center,
200 W. Arbor Dr., San Diego, CA 92103.
OBJECTIVE. Using MR arthrography, we examined normal anatomy, anatomic variations, and pitfalls of imaging the labral capsular ligamentous complex in the asymptomatic shoulder.
SUBJECTS AND METHODS. We obtained 108 MR arthrograms of the glenohumeral joint in 95 asymptomatic volunteers with axial (108 shoulders) and oblique coronal (56 shoulders) images. We examined labral shape, patterns of capsular insertion, presence or absence of glenohumeral ligaments, and pitfalls of imaging. Our patients were men (auxiliary policemen) between 19 and 24 years old (mean age, 21 years).
RESULTS. The shapes of labra were triangular (anterior part, 64%; posterior part, 47%), round (17%; 33%), flat (2%; 17%), cleaved (11%; 1%), notched (3%; 0%), or absent (2%; 2%). Using the system of Mosely and Overgaard, the anterior capsular insertion was type 1 in 63% of shoulders, type 2 in 20%, and type 3 in 17%; the posterior capsular insertion was type 1 in 60% of shoulders, type 2 in 31%, and type 3 in 9%. The superior and inferior glenohumeral ligaments were present in 99% of shoulders, but the middle glenohumeral ligament was present in only 79%. We also detected many pitfalls of MR imaging in identifying findings such as the undercutting of the labrum by cartilage (32% of shoulders), prominent axillary folds (46%), sublabral holes (7%) or recesses (33%), Buford complexes (2%), and sulci between the biceps tendon and superior labrum (30%).
CONCLUSION. Knowledge of normal anatomy and anatomic variations of the labral complex is important for the examination of the shoulder with MR arthrography.
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati What's this?
This article has been cited by other articles:
|
|
 |
|
  H.-T. Song, Y.-M. Huh, S. Kim, S.-J. Kim, and J.-S. Suh The Usefulness of Virtual MR Arthroscopy as an Adjunct to Conventional MR Arthrography in Detecting Anterior Labral Lesions of the Shoulder Am. J. Roentgenol., April 1, 2009; 192(4): W149 - W155. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Y. Jung, Y. C. Yoon, S.-H. Choi, J. W. Kwon, J. Yoo, and B.-K. Choe Three-dimensional Isotropic Shoulder MR Arthrography: Comparison with Two-dimensional MR Arthrography for the Diagnosis of Labral Lesions at 3.0 T Radiology, February 1, 2009; 250(2): 498 - 505. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. G. Rao, T. K. Kim, E. Chronopoulos, and E. G. McFarland Anatomical Variants in the Anterosuperior Aspect of the Glenoid Labrum: A Statistical Analysis of Seventy-three Cases J. Bone Joint Surg. Am., March 31, 2003; 85(4): 653 - 659. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. J. Tuite, D. G. Blankenbaker, M. Seifert, A. J. Ziegert, and J. F. Orwin Sublabral Foramen and Buford Complex: Inferior Extent of the Unattached or Absent Labrum in 50 Patients Radiology, April 1, 2002; 223(1): 137 - 142. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
